Abstract The idea of using ultrashort X-ray pulses to obtain images of single proteins frozen in time has fascinated and inspired many. It was one of the arguments for building X-ray free-electron lasers. According to theory. the extremely intense pulses provide sufficient signal to dispense with using crystals as an amplifier. https://www.spidertattooz.com/Orly-Nail-Lacquer-Impressions-Collection-p28870/